Added hover effects

git-svn-id: svn://sunsvr01.isp.uni-luebeck.de/swproj13/trunk@166 72836036-5685-4462-b002-a69064685172

1 files changed, 37 insertions, 1 deletions

diff --git a/src/jrummikub/view/impl/AbstractStonePanel.java b/src/jrummikub/view/impl/AbstractStonePanel.java
index 7210d1c..fd3862b 100644
--- a/src/jrummikub/view/impl/AbstractStonePanel.java
+++ b/src/jrummikub/view/impl/AbstractStonePanel.java
@@ -3,6 +3,7 @@ package jrummikub.view.impl;
 import java.awt.Insets;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionAdapter;
 import java.awt.geom.Rectangle2D;
 import java.util.Collections;
 
@@ -30,6 +31,7 @@ abstract class AbstractStonePanel extends JPanel implements IStonePanel,
 	private Event2<Stone, Boolean> setClickEvent = new Event2<Stone, Boolean>();
 
 	private Iterable<Pair<Stone, Position>> stones = Collections.emptySet();
+	private Stone hoveredStone = null;
 
 	/**
 	 * @return the stone painter
@@ -52,7 +54,7 @@ abstract class AbstractStonePanel extends JPanel implements IStonePanel,
 	 *          the grid scale
 	 */
 	public AbstractStonePanel(float scale) {
-		super(false); // Unset double buffered
+		super(true); // Set double buffered
 
 		stonePainter = new StonePainter(scale);
 
@@ -81,9 +83,43 @@ abstract class AbstractStonePanel extends JPanel implements IStonePanel,
 
 				event.emit(stone, e.isControlDown());
 			}
+
+			@Override
+			public void mouseExited(MouseEvent e) {
+				setHoveredStone(null);
+			}
+		});
+
+		addMouseMotionListener(new MouseMotionAdapter() {
+			@Override
+			public void mouseMoved(MouseEvent e) {
+				Insets insets = getInsets();
+				Pair<Integer, Integer> trans = getTranslation();
+				Position pos = stonePainter.calculatePosition(e.getX() - insets.left
+						- trans.getFirst(), e.getY() - insets.top - trans.getSecond());
+
+				setHoveredStone(getStoneAt(pos));
+			}
 		});
 	}
 
+	private void setHoveredStone(Stone stone) {
+		Stone oldStone = hoveredStone;
+		hoveredStone = stone;
+
+		if (oldStone != hoveredStone)
+			repaint();
+	}
+
+	/**
+	 * Returns the stone the mouse pointer is hovering over
+	 * 
+	 * @return the hovered stone
+	 */
+	protected Stone getHoveredStone() {
+		return hoveredStone;
+	}
+
 	/**
 	 * *Overwrite this method* to signal if special zone was clicked
 	 *